Welcome!
Click on image for a better view:
![A great book for learning about Image collecting A great book for learning about Image collecting](https://s.turbifycdn.com/aah/modoc1873/a-great-book-for-learning-about-image-collecting-113.jpg)
"Collector's Guide to Early Photographs
by O. Henry Mace"
You can order this at Amazon.com. They are even having a sale on them. This is a superb reference for all types of early photography. I recommend you buy one and keep it handy.